Add test file

cairo_programs/unsafe_keccak_finalize.cairo

@@ -0,0 +1,28 @@
+%builtins output
+
+from starkware.cairo.common.alloc import alloc
+from starkware.cairo.common.serialize import serialize_word
+from starkware.cairo.common.keccak import unsafe_keccak_finalize, KeccakState
+from starkware.cairo.common.uint256 import Uint256
+
+func main{output_ptr: felt*}() {
+    alloc_locals;
+
+    let (data: felt*) = alloc();
+
+    assert data[0] = 0;
+    assert data[1] = 1;
+    assert data[2] = 2;
+
+    let keccak_state = KeccakState(start_ptr=data, end_ptr=data + 2);
+
+    let res: Uint256 = unsafe_keccak_finalize(keccak_state);
+
+    assert res.low = 17219183504112405672555532996650339574;
+    assert res.high = 235346966651632113557018504892503714354;
+
+    serialize_word(res.low);
+    serialize_word(res.high);
+
+    return ();
+}